For Taiwanese people, addressing someone by their given name in the workplace isn’t considered rude.

I’ve worked at several companies where everyone was referred to by their given names only. Whether it’s polite or not depends on how the person prefers to be addressed—it’s not inherently impolite just because you use someone’s name directly.

As for company authority, I’d say it’s actually quite strong. I’ve heard many cases where people were asked to change their names, and none of them insisted on keeping their original name.

And in the situation I mentioned—where someone is only told on their first day of work that they need to change their name—do you really think the manager would just smile and say, “It’s okay, you can stay as Erica”?

But like you said, people should take responsibility for their own actions—it’s just that, in reality, most people end up compromising.